无线自组网络中多令牌介质访问控制算法的分析与仿真.docx

东北大学磺士学位论史 摘要
无线翻组网络中多令牌介质访问控制算法的研究与仿真
摘 要
随着计算机技术的飞速发展和人们对通信需求的不断提高,无线通信网络获鼹了燹广阕鳃应露鸯蓼最。远且年,茏线嬲终蟾发震罄零迅速, 网络是随蒋无线通信技术的快速发展而出现的一种新溅网络。,整个嬲终没蠢闲定的基础设辘,也没毒固定鳇路囊器,所有节点都可以任意移动,并且都能以任意方式幼态地保持与麓它节点黪联系。在这摹孛坯壤孛,由于终溃的纛线覆羲筵圉数餐限性,鼹令纛法直接进行通信的用户终端可以借助干其它节点进行分组转发。每一个节点都可以说是一拿鼹电爨,宅{}】瑟毙完成发现秘维持刭其宅节患鼹由的功能。Ad—hoe 网络在军枣和民用领域褥到越来越广泛的应用,如战场信息中继,紧急通信器婺,以及可共享售息黪褒监会议等。
,并且已经援汰了许多寿创建蛙的算法;}曩协议,其中一部公已经佟为甏结构帮分级结构。乎麟缝梅中,所蠢节点的地位平等,所以又可以称为对等式结构。而分缀结构巾,网络被划分为簇(cluster),每个簇由一个簇黄(clusterhead)秘多个簇成受(cluster。member)组成。,而随着网络援模豹增长,,采熙分级缝槐会获褥更好的性能。,分攒了在瑰蠢豹尼耱无线会质访阕控制算法在不同信道负载馕提下的饿能,、簇成员数量频繁交化,在簇内使用瑰窍的分矮访闯控制算法难以羧褥最佳性能的阀题。然后阐述了一种多令牌介质访问控制算法,并用NS2避行了仿真。该算法可以髓着簇内无线信道负载的变化,垂动媳在竞争类和搬队类冀法之闻折衷,使得网络保持较商的吞吐率和较低的包传输时题。仿真结果袭明,在簇成员数量和信道负载变化显
著的Ad。hoe网终中,该算法具肖比竞争类和j嚣队类算法更好的性能。
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东托炙学硕士掌往论文 摘要
关键诞:无线垂缠测终 食震访阏控剑 多令牌分霞谚阕控制算法网络仿真NS
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东jb大学硕毒学位论戈 Abstmet
The Research and Simulation on the Multiple—token Media
Access Control Algorithm in Ad—works
ABSTRACT
、聃th the fast development puter technology and the growing demand munication,munication technology and work e more and more ,wireless Ad-works are gathering growing interest in the information technology indus挺y as a kind of newly arising Ad-works that are
also called multi-works because data often need to be forwarded by other mobile hosts munication among hosts is implemented,infrastructure is dispensable in addition to the mobility of mobile hosts。Ad-works are used more and more widely in military and civilian applications due to the rapid
organizing works and the outstanding ability of destruction-resistance and
self-recovery.
Many researches have been done on Ad—works and mature algorithms
and protocols have been proposed,among which some has been set as standard. There are two types of architectures with respect to Ad·works,。,
flat structure and hierarch